[RiCR-wana-b]

to be honest man, there is no need to even try to throw a skyline engine in a bimmer... if your lookin to swap in any type of motor, find yourself a 2000+ M3 motor and driveline. becuase the fabrication need to swap an RB would take a couple months. the swap with the M3 would be ten times easier. the motor if you find the right one would probably run you like 7 or 8 grand. but who knows... you can find one for even cheaper. but back to the original question.
i actually just or am about to be finished swapping a 1897 325i motor tranny and driveline into a 1984 325e chassis. the only thing that needed any real fabrication was two mounts for the ABS system. everything else basiaclly bolts right in. so if you can find a newer bimmer motor trans driveline and diff. then you're set.
and turbos/ superchargers are WAY over priced, well for that matter all bimmer parts are over priced. but with the chassis you have, an 1990's motor would put u probably into the mid 14's and with an intake, exhaust and chip you'd be runnin just fine. in total that would probably run you any where from 6 to 9... but take my advice, this is quite a task you're thinking about undertaking. its alot of work but very little fabrication.

hope that helps